feat: add scalattice openai-compatible provider

[romulushill]

Summary

• Register Scalattice in litellm/llms/openai_like/providers.json
• Document endpoint coverage in provider_endpoints_support.json (chat completions)
• Add Scalattice to the dashboard Providers enum + logo (scalattice.svg)
• Publish catalog model pricing in model_prices_and_context_window.json (backup synced)
• Base URL: https://api.scalattice.cloud/v1
• API key env: SCALATTICE_API_KEY (optional override via SCALATTICE_API_BASE)

Docs page (separate repo): BerriAI/litellm-docs#719

Usage

import litellm
import os

os.environ["SCALATTICE_API_KEY"] = "slt_..."
resp = litellm.completion(
    model="scalattice/qwen-3-8b",
    messages=[{"role": "user", "content": "Hello"}],
)

Docs: https://scalattice.cloud/docs/developers#litellm
Product: https://scalattice.com/

Test plan

• Local check_provider_folders_documented.py passes
• CI against litellm_internal_staging
• Dashboard shows Scalattice logo for scalattice provider
• Live litellm.completion(model="scalattice/<model>", ...) with SCALATTICE_API_KEY

[CLAassistant]

All committers have signed the CLA.

[greptile-apps]

Provider coverage metadata is missing

When the provider documentation coverage check loads this new registry key, scalattice has no matching entry in provider_endpoints_support.json, causing the check to raise UndocumentedProviderError.

Rule Used: Block new LLM Provider integrations if they're ope... (source)

Knowledge Base Used: LLM Provider Adapters

[greptile-apps]

Greptile Summary

Adds Scalattice as a JSON-configured OpenAI-compatible provider.

• Registers the Scalattice API base URL and API-key environment variable.
• Supports an API-base override through SCALATTICE_API_BASE.
• Declares chat completions as the supported endpoint.

Confidence Score: 4/5

The provider coverage failure must be fixed before merging by adding Scalattice to provider_endpoints_support.json.

The runtime JSON-provider resolution path handles Scalattice, but the new registry key deterministically violates the repository's provider documentation coverage check and raises UndocumentedProviderError.

Files Needing Attention: litellm/llms/openai_like/providers.json and provider_endpoints_support.json

Important Files Changed

Filename	Overview
litellm/llms/openai_like/providers.json	Adds the Scalattice registry entry, but omits the coordinated endpoint-support metadata required by the provider coverage check.

_{Reviews (1): Last reviewed commit: "Add Scalattice as an OpenAI-compatible p..." | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[codspeed-hq]

Merging this PR will not alter performance

✅ 31 untouched benchmarks

---

_{Comparing scalattice:feat/scalattice-openai-compatible-provider (bc2ff0d) with litellm_internal_staging (71b825a)}

[romulushill]

Follow-up pushed on this branch:

• Dashboard provider entry + Scalattice logo (scalattice.svg)
• Catalog model pricing in model_prices_and_context_window.json (backup synced)

Docs page PR (separate repo): BerriAI/litellm-docs#719

[romulushill]

Fixed pricing backup pollution: rebuilt model prices from upstream staging and re-added only Scalattice catalog entries so gpt-5.4-mini/nano max_input_tokens stay at 272000 in both files.